.lesson{
  width: 750rpx;
  height: 300rpx;
  background-image: linear-gradient(-133deg, #FF769B 0%, #FFC29C 100%);
  overflow: hidden;
  .title{
    margin-top: 34rpx;
    text-align: center;
    font-size: 36rpx;
    color: #fff;
    letter-spacing: 2rpx;
    line-height: 50rpx;
  }
  .content{
    margin: 12rpx 26rpx 0 48rpx;
    font-family: PingFangSC-Regular;
    font-size: 28rpx;
    color: #FFFFFF;
  }
  .btn{
    margin: 36rpx auto 0;
    width: 172rpx;
    height: 50rpx;
    box-sizing: border-box;
    border: 2rpx solid #FFFFFF;
    border-radius: 32rpx;
    font-size: 26rpx;
    color: #FFFFFF;
    text-align: center;
    line-height: 50rpx;
  }
}

.web{
  background-image: linear-gradient(-135deg, #6BBBFF 0%, #B9A7FF 100%);
}

.masker{
  position: fixed;
  top: 0;
  left: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
  background-color:rgba(0,0,0,.5);
  .box{
    width: 574rpx;
    height: 450rpx;
    background-color: #fff;
  }
}
.go-top{
  position: fixed;
  bottom: 0;
  right: 20rpx;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 84rpx;
  height: 52rpx;
  background-image: linear-gradient(-136deg, #3683FF 0%, #7B86FF 100%);
  color: #fff;
}